From bf6b4e2e8ebb63f6b8466bc98650ce75f3bdc79f Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sun, 12 Nov 2023 01:37:02 -0600
Subject: rtl/gfx: implement fragment shading

---
 rtl/gfx/gfx_frag.sv | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

(limited to 'rtl/gfx/gfx_frag.sv')

diff --git a/rtl/gfx/gfx_frag.sv b/rtl/gfx/gfx_frag.sv
index 3598ed9..b4481ce 100644
--- a/rtl/gfx/gfx_frag.sv
+++ b/rtl/gfx/gfx_frag.sv
@@ -27,7 +27,7 @@ module gfx_frag
 
 	logic addr_ready, addr_stall;
 
-	gfx_pipeline_flow #(.STAGES(`GFX_FRAG_ADDR_STAGES)) addr_flow
+	gfx_pipeline_flow #(.STAGES(`GFX_FRAG_SHADE_STAGES)) addr_flow
 	(
 		.stall(addr_stall),
 		.in_ready(addr_ready),
@@ -37,12 +37,36 @@ module gfx_frag
 		.*
 	);
 
+	linear_coord linear;
+
 	gfx_frag_addr addr
 	(
+		.frag(funnel_frag),
 		.stall(addr_stall),
+		.*
+	);
 
-		.frag(funnel_frag),
-		.linear(),
+	localparam ADDR_WAIT_Z_STAGES = `GFX_FRAG_SHADE_STAGES - `GFX_FRAG_ADDR_STAGES;
+
+	gfx_pipes #(.WIDTH($bits(linear_coord)), .DEPTH(ADDR_WAIT_Z_STAGES)) addr_pipes
+	(
+		.in(linear),
+		.out(),
+		.stall(addr_stall),
+		.*
+	);
+
+	gfx_frag_shade shade
+	(
+		.stall(addr_stall),
+
+		.b1(),
+		.b2(),
+		.color(),
+
+		.argb0(),
+		.argb1_argb0(),
+		.argb2_argb0(),
 		.*
 	);
 
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